Does this place have an updated inventory of what's in their lot if I call?

Ya call first talk 2 guy & they will tell Ya what they got

Now u know everything about your question

Yes they know exactly what vehicles they have in their yard. They can tell you if they have the make model or year that you are looking for but they cannot tell you if the part you are looking for is available.

Yes they do. Not of specific parts, but they know what make, model, and year of the vehicles they have.